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प्रश्न
What type of oxides are formed when metals combine with oxygen? Explain with the help of an example.
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उत्तर
When metals react with oxygen to form metal oxides. Metal oxides are basic in nature. Some of the metal oxides react with water to form alkalis. Metal oxides, being basic, turn red litmus solution blue.
The intensity of the reaction with oxygen depends on the metal’s chemical reactivity. Certain metals react with oxygen at ambient temperature; others require heating, while some require intense heating to react.
Sodium metal reacts with the oxygen of air at room temperature to form a basic oxide called sodium oxide.
\[\ce{\underset{(Metal)}{\underset{Sodium}{4Na_{(s)}}} + \underset{(From air)}{\underset{Oxygen}{O2_{(g)}}} -> \underset{(Basic oxide)}{\underset{Sodium oxide}{2Na2O_{(s)}}}}\]
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संबंधित प्रश्न
Metal A has electronic configuration (2, 8, 1) and metal B has (2, 8, 8, 2). Which is more reactive? Why? Identify these metals.
A copper coin is kept immersed in a solution of silver nitrate for some time. What will happen to the coin and the colour of the solution?
Name the metal which has been placed at the top of the reactivity series.
What will happen if a strip of copper is kept immersed in a solution of silver nitrate (AgNO3)?
How would you show that silver is chemically less reactive than copper?
Complete and balance the following equation:
\[\ce{Na + O2 ->}\]
Complete and balance the following equation:
\[\ce{Cu(NO3)2_{(aq)} + Zn_{(s)} ->}\]
Which of the following elements would yield an acidic oxide?
Na, S, C, K, H
Which of the following elements would yield a neutral oxide?
Na, S, C, K, H
What happens when calcium reacts with chlorine? Write an equation for the reaction which takes place.
Why does aluminium not react with water under ordinary conditions?
Write the equation for the reaction of Iron with dilute hydrochloric acid.
Name the products formed. Also indicate the physical states of all the substances involved.
You are given a solution of AgNO3. Which of the following do you think cannot displace Ag from AgNO3solution?
(a) Magnesium
(b) Zinc
(c) Gold
(d) Copper
The least reactive metal among the following is:
(a) sodium
(b) silver
(c) copper
(d) lead
The metals which can produce amphoteric oxides are:
(a) sodium and aluminium
(b) zinc and potassium
(c) calcium and sodium
(d) aluminium and zinc
The elements whose oxides can turn litmus solution red are:
(a) lithium and sodium
(b) copper and potassium
(c) carbon and hydrogen
(d) phosphorus and sulphur
Write the name and formula of a molecule made up of three atoms of oxygen.
Choose the correct alternative and rewrite the following:
Which of the following is lue in colour?
Explain the following:
Reactivity of aluminium decrease if it is dipped in nitric acid.
Where does the metal aluminium, used in the thermit process, occurs in the reactivity series of metals?
